Hi @Sankalp I'm sorry to hear you are experiencing difficulties. Do you have the most up to date Chrome browser? If you don't, could you try updating Chrome and see if you can replicate again. If you are still experiencing the issue, could you log into your account > go to app builder where you attempted to click on the 'view app' button > click on the '?' icon on the left panel > 'Report an issue'. This will provide our team with diagnostic information to help further troubleshoot this.
If you do report the issue via the steps above please also include any further details in the note. For example, when you say you tried logging into the app, did you copy and paste the app url into your browser?